avantguard stopping engine in parking lot

so your saying 

the truck starts and drives fine  when started by key?

or

truck acts up when remote starting  and driving from the remote start ,

the fuel cut off on it will only run the engine 3-5 sec so thats barely time to put it in gear ,

let us know 

I almost always use the remote start feature so I rarely started using the key alone.   (Those rare occasions when I used the key alone to start, I didn not observe this problem, but that small sample is inconclusive because it is intermittent... stall happens once in around 10 starts sometimes, once in around 50 starts recently).

well try it with the key some times

but if its with remote start problem id have the system checked and the bypass module

thats all i can help with  ,

good luck